On two problems with displacement at three points of boundary characteristics for a degenerate hyperbolic equation. Uzbek Mathematical Journal, [S. l.], v. 70, n. 3, p. 146–151, 2026. DOI: 10.29229/uzmj.2026-3-15. Disponível em: https://uzmj.mathinst.uz/index.php/uzmj/article/view/70.. Acesso em: 7 oct. 2026.